Countries from across the world competed in a sports tournament. Can you devise an efficient strategy to work out the order in which they finished?

Long Multiplication

Stage: 3 Challenge Level:

Catherine, Rachel & Fiona from The Mount School, York, Sonia
from Madras College, and the KS3 Maths Club from Strabane Grammar
School all solved this. Everyone used trial and improvement but
soon realised that there could not be a 2 in the two original
numbers. James of Hethersett High School, Norwich gave the best
explanation of the method. The answer is 775 multiplied by 33.

The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the
NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to
embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities
can be found here.